Use the arrow keys to control the silversphere. The aim of the game is to enter the blue vortex in the each level. Do this by rolling on top of the vortex. Stay on the land - if you fall in the water you will lose 500 points and have to restart the level. Tho gold spheres explode on impact with anything, so don't run into them. You can push boxes around to clear paths and build bridges, but only one box can be pushed at a time. There are also ice cubes in some levels. These will slide until they fall in the water or collide with a solid object. These claws are not dangerous, but require a box to be loaded in them. Once all the claws are loaded, the vortex will appear. The blue claws will not work unless they are loaded with an ice cube. Finally, there is a time limit counting down at the bottom of the screen. Run out of time and the silversphere will explode, you will lose 500 points, and the level will restaret.